PDF(Pubmed)
Abstract：
BACKGROUND: Functional redundancy (FR) is widely present, but there is no consensus on its formation process and influencing factors. Taxonomically distinct microorganisms possessing genes for the same function in a community lead to within-community FR, and distinct assemblies of microorganisms in different communities playing the same functional roles are termed between-community FR. We proposed two formulas to respectively quantify the degree of functional redundancy within and between communities and analyzed the FR degrees of carbohydrate degradation functions in global environment samples using the genetic information of glycoside hydrolases (GHs) encoded by prokaryotes.
RESULTS: Our results revealed that GHs are each encoded by multiple taxonomically distinct prokaryotes within a community, and the enzyme-encoding prokaryotes are further distinct between almost any community pairs. The within- and between-FR degrees are primarily affected by the alpha and beta community diversities, respectively, and are also affected by environmental factors (e.g., pH, temperature, and salinity). The FR degree of the prokaryotic community is determined by deterministic factors.
CONCLUSIONS: We conclude that the functional redundancy of GHs is a stabilized community characteristic. This study helps to determine the FR formation process and influencing factors and provides new insights into the relationships between prokaryotic community biodiversity and ecosystem functions. Video Abstract.
RESULTS: Our results revealed that GHs are each encoded by multiple taxonomically distinct prokaryotes within a community, and the enzyme-encoding prokaryotes are further distinct between almost any community pairs. The within- and between-FR degrees are primarily affected by the alpha and beta community diversities, respectively, and are also affected by environmental factors (e.g., pH, temperature, and salinity). The FR degree of the prokaryotic community is determined by deterministic factors.
CONCLUSIONS: We conclude that the functional redundancy of GHs is a stabilized community characteristic. This study helps to determine the FR formation process and influencing factors and provides new insights into the relationships between prokaryotic community biodiversity and ecosystem functions. Video Abstract.
摘要：
背景：功能冗余（FR）广泛存在，但对其形成过程和影响因素尚无共识。在群落中具有相同功能的基因的分类学上不同的微生物导致群落内FR，不同群落中发挥相同功能作用的微生物的不同装配称为群落间FR。我们提出了两个公式来分别量化社区内部和社区之间的功能冗余程度，并使用原核生物编码的糖苷水解酶（GHs）的遗传信息分析了全球环境样本中碳水化合物降解功能的FR程度。
结果：我们的结果表明，GHs分别由群落内多个分类不同的原核生物编码，和编码酶的原核生物在几乎任何群落对之间都是不同的。内部和之间的FR度主要受α和β群落多样性的影响，分别,并且还受到环境因素的影响(例如，pH值,温度,和盐度）。原核生物群落的FR程度由确定性因素决定。
结论：我们得出结论，GHs的功能冗余是稳定的群落特征。本研究有助于确定FR的形成过程和影响因素，并为原核生物群落生物多样性与生态系统功能之间的关系提供新的见解。视频摘要。
结果：我们的结果表明，GHs分别由群落内多个分类不同的原核生物编码，和编码酶的原核生物在几乎任何群落对之间都是不同的。内部和之间的FR度主要受α和β群落多样性的影响，分别,并且还受到环境因素的影响(例如，pH值,温度,和盐度）。原核生物群落的FR程度由确定性因素决定。
结论：我们得出结论，GHs的功能冗余是稳定的群落特征。本研究有助于确定FR的形成过程和影响因素，并为原核生物群落生物多样性与生态系统功能之间的关系提供新的见解。视频摘要。
